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Stained Glass Calculator — Glass Area & Layout Planner

Plan panel size, glass area, and border footage before moving on to exact solder or lead-came estimates

Panel Materials

7.50 sq ft

Border

10.0 ft

Technique

Copper Foil

Units

Layout & Material Snapshot

Glass Required
7.50
square feet (with 25% waste)
Average Piece Size
17.3
square inches
Border Footage
10.0
linear feet planned around panel perimeter
Technique Supply Length
69.3
linear feet of foil
Joining Supply
12.5
ounces
Liquid Flux
8.3
ounces
Patina
4.2
ounces

Material Breakdown

Glass (sq ft)7.5
Technique Length69.3
Joining Supply12.5
Flux (oz)8.3

Materials Reference Guide

MaterialCommon SizesUsage Notes
Copper Foil7/32", 1/4", 5/16"Choose width based on glass thickness
H-Came3/16", 1/4", 3/8"Channel width matches glass thickness
U-Came (Border)3/16", 1/4", 3/8"Zinc or brass for panel edges
60/40 Solder1 lb spoolFor copper foil technique
50/50 Solder1 lb spoolFor lead came technique
Art Glass12" x 12" sheetsStandard sheet size, various colors

Stained Glass Project Tips

1.
Plan Your Waste
The 25% waste factor accounts for cutting losses, breakage, and pattern matching.
2.
Choose the Right Technique
Copper foil allows intricate curves. Lead came is traditional and faster for geometric patterns.
3.
Foil Width Matters
Use 7/32" foil for thin glass, 1/4" for standard 3mm glass, and 5/16" for thicker art glass.
4.
Glass Selection
Cathedral glass is transparent, opalescent is opaque. Mix types for visual interest.
5.
Border Strength
Always use zinc or brass came for borders. It provides structural support.
6.
Safety First
Work in ventilated areas when soldering. Wear safety glasses for cutting glass.

What You'll Need

Toyo Supercutter Pistol Grip Glass Cutter TC-17

$15-$254.6
View on Amazon
Venture Tape Copper Foil 7/32" x 36yd

Venture Tape Copper Foil 7/32" x 36yd

$8-$144.5
View on Amazon
Hakko FX601 Stained Glass Soldering Iron 67W

Hakko FX601 Stained Glass Soldering Iron 67W

$40-$554.6
View on Amazon

Toyo Supercutter Pistol Grip Glass Cutter TC-17

$15-$254.6
View on Amazon
Venture Tape Copper Foil 7/32" x 36yd

Venture Tape Copper Foil 7/32" x 36yd

$8-$144.5
View on Amazon
Hakko FX601 Stained Glass Soldering Iron 67W

Hakko FX601 Stained Glass Soldering Iron 67W

$40-$554.6
View on Amazon

As an Amazon Associate, we earn from qualifying purchases.

Example Calculations

1Small Suncatcher — Copper Foil

Inputs

Panel Width8 inches
Panel Height10 inches
Piece Count15
TechniqueCopper foil

Result

Glass Area Needed0.67 sq ft
Average Piece Size5.3 sq in
Border Footage3 ft

Panel area: 8 × 10 = 80 sq in = 0.56 sq ft. With 20% waste: 0.67 sq ft. Border: 2(8 + 10) = 36 in = 3 ft.

2Medium Window Panel — Lead Came

Inputs

Panel Width18 inches
Panel Height24 inches
Piece Count45
TechniqueLead came

Result

Glass Area Needed3.75 sq ft
Average Piece Size9.6 sq in
Border Footage7.7 ft

Panel area: 18 × 24 = 432 sq in = 3 sq ft. With 25% waste for moderate complexity: 3.75 sq ft. Border: 2(18 + 24) = 84 in + 10% = 7.7 ft.

Frequently Asked Questions

Q

What should this stained glass calculator be used for?

Use this page as a project-planning tool for panel size, glass area, average piece density, and broad material setup. It is best for deciding whether a layout is small, medium, or material-heavy before you calculate exact joining supplies.

  • Panel area: total square feet of glass needed with waste factor
  • Piece density: average piece size based on complexity level
  • Border footage: perimeter came or zinc channel length
  • Technique comparison: copper foil vs lead came vs fused glass
Q

When should I switch from layout planning to a dedicated supply tool?

Move on from this page when you need exact seam footage, joining supply weight, flux, internal came footage, stick counts, or reinforcement planning. This page is intentionally broader and earlier in the workflow.

  • Solder Calculator: exact seam length, solder ounces, flux amount
  • Lead Came Calculator: internal came footage, stick count, rebar bars
  • This page: glass area, piece count, border footage, technique choice
FeatureLayout PlannerSolder CalcLead Came Calc
StagePlanningAssemblyAssembly
Key outputSq ft of glassOz of solderFeet of came
Best forBudgeting, sizingCopper foil buildsLead came builds
Q

How much border came should I plan for a panel?

A simple starting point is the panel perimeter: two widths plus two heights. Then add a little extra for trimming, corners, and mistakes if you are ordering rigid zinc or brass border came.

  • Small panel (12×12 in): ~4 ft of border came plus 10% trim waste
  • Medium panel (18×24 in): ~7 ft of border came plus 10% trim
  • Large panel (24×36 in): ~10 ft of border came plus 15% trim
  • Zinc channel is more rigid than lead and easier for straight borders
Q

How much glass waste should I expect?

Plan for 15–25% waste depending on piece complexity and your skill level. Intricate curved cuts waste more glass than simple geometric shapes.

  • Simple geometric pieces: 15% waste is typical for experienced cutters
  • Moderate curves and irregular shapes: 20% waste is a safe estimate
  • Complex organic curves: 25–30% waste for difficult shapes
  • Opalescent and textured glass wastes more due to grain direction
Glass TypeCost per sq ftTypical WasteBest For
Cathedral$4–$815–20%Backgrounds, simple panels
Opalescent$8–$1520–25%Featured pieces, flowers
Textured$10–$2020–30%Accent pieces, water effects
Dichroic$25–$5015–20%Jewelry, small accents

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Last Updated: Mar 26, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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